<?php
/*
File: xajaxUserFunction.inc.php
Contains the xajaxUserFunction class
Title: xajaxUserFunction class
Please see <copyright.inc.php> for a detailed description, copyright
and license information.
*/
/*
@package xajax
@version $Id: xajaxUserFunction.inc.php 362 2007-05-29 15:32:24Z calltoconstruct $
@copyright Copyright (c) 2005-2007 by Jared White & J. Max Wilson
@copyright Copyright (c) 2008-2009 by Joseph Woolley, Steffen Konerow, Jared White & J. Max Wilson
@license http://www.xajaxproject.org/bsd_license.txt BSD License
*/
/*
Class: xajaxUserFunction
Construct instances of this class to define functions that will be registered
with the <xajax> request processor. This class defines the parameters that
are needed for the definition of a xajax enabled function. While you can
still specify functions by name during registration, it is advised that you
convert to using this class when you wish to register external functions or
to specify call options as well.
*/
class xajaxUserFunction
{
/*
String: sAlias
An alias to use for this function. This is useful when you want
to call the same xajax enabled function with a different set of
call options from what was already registered.
*/
var $sAlias;
/*
Object: uf
A string or array which defines the function to be registered.
*/
var $uf;
/*
String: sInclude
The path and file name of the include file that contains the function.
*/
var $sInclude;
/*
Array: aConfiguration
An associative array containing call options that will be sent to the
browser curing client script generation.
*/
var $aConfiguration;
/*
Function: xajaxUserFunction
Constructs and initializes the <xajaxUserFunction> object.
$uf - (mixed): A function specification in one of the following formats:
- a three element array:
(string) Alternate function name: when a method of a class has the same
name as another function in the system, you can provide an alias to
help avoid collisions.
(object or class name) Class: the name of the class or an instance of
the object which contains the function to be called.
(string) Method: the name of the method that will be called.
- a two element array:
(object or class name) Class: the name of the class or an instance of
the object which contains the function to be called.
(string) Method: the name of the method that will be called.
- a string:
the name of the function that is available at global scope (not in a
class.
$sInclude - (string, optional): The path and file name of the include file
that contains the class or function to be called.
$aConfiguration - (array, optional): An associative array of call options
that will be used when sending the request from the client.
Examples:
$myFunction = array('alias', 'myClass', 'myMethod');
$myFunction = array('alias', &$myObject, 'myMethod');
$myFunction = array('myClass', 'myMethod');
$myFunction = array(&$myObject, 'myMethod');
$myFunction = 'myFunction';
$myUserFunction = new xajaxUserFunction($myFunction, 'myFile.inc.php', array(
'method' => 'get',
'mode' => 'synchronous'
));
$xajax->register(XAJAX_FUNCTION, $myUserFunction);
*/
function xajaxUserFunction($uf, $sInclude=NULL, $aConfiguration=array())
{
$this->sAlias = '';
$this->uf =& $uf;
$this->sInclude = $sInclude;
$this->aConfiguration = array();
foreach ($aConfiguration as $sKey => $sValue)
$this->configure($sKey, $sValue);
if (is_array($this->uf) && 2 < count($this->uf))
{
$this->sAlias = $this->uf[0];
$this->uf = array_slice($this->uf, 1);
}
//SkipDebug
if (is_array($this->uf) && 2 != count($this->uf))
trigger_error(
'Invalid function declaration for xajaxUserFunction.',
E_USER_ERROR
);
//EndSkipDebug
}
/*
Function: getName
Get the name of the function being referenced.
Returns:
string - the name of the function contained within this object.
*/
function getName()
{
// Do not use sAlias here!
if (is_array($this->uf))
return $this->uf[1];
return $this->uf;
}
/*
Function: configure
Call this to set call options for this instance.
*/
function configure($sName, $sValue)
{
if ('alias' == $sName)
$this->sAlias = $sValue;
else
$this->aConfiguration[$sName] = $sValue;
}
/*
Function: generateRequest
Constructs and returns a <xajaxRequest> object which is capable
of generating the javascript call to invoke this xajax enabled
function.
*/
function generateRequest($sXajaxPrefix)
{
$sAlias = $this->getName();
if (0 < strlen($this->sAlias))
$sAlias = $this->sAlias;
return new xajaxRequest("{$sXajaxPrefix}{$sAlias}");
}
/*
Function: generateClientScript
Called by the <xajaxPlugin> that is referencing this function
reference during the client script generation phase. This function
will generate the javascript function stub that is sent to the
browser on initial page load.
*/
function generateClientScript($sXajaxPrefix)
{
$sFunction = $this->getName();
$sAlias = $sFunction;
if (0 < strlen($this->sAlias))
$sAlias = $this->sAlias;
echo "{$sXajaxPrefix}{$sAlias} = function() { ";
echo "return xajax.request( ";
echo "{ xjxfun: '{$sFunction}' }, ";
echo "{ parameters: arguments";
$sSeparator = ", ";
foreach ($this->aConfiguration as $sKey => $sValue)
echo "{$sSeparator}{$sKey}: {$sValue}";
echo " } ); ";
echo "};\n";
}
/*
Function: call
Called by the <xajaxPlugin> that references this function during the
request processing phase. This function will call the specified
function, including an external file if needed and passing along
the specified arguments.
*/
function call($aArgs=array())
{
$objResponseManager =& xajaxResponseManager::getInstance();
if (NULL != $this->sInclude)
{
ob_start();
require_once $this->sInclude;
$sOutput = ob_get_clean();
//SkipDebug
if (0 < strlen($sOutput))
{
$sOutput = 'From include file: ' . $this->sInclude . ' => ' . $sOutput;
$objResponseManager->debug($sOutput);
}
//EndSkipDebug
}
$mFunction = $this->uf;
$objResponseManager->append(call_user_func_array($mFunction, $aArgs));
}
}
?>